<div class="icheckbox">
    <volist name="list" id="tf">
        <div class="square-red single-row source">
            <label for="sources-{$i}">
                <input class="input" type="radio" name="taskform" value="{$tf.id}"  />
                {$tf.name}
            </label>
        </div>
    </volist>
</div>